The OPAC breadcrumb links are on a grey background and don't have sufficient contrast. This makes the text difficult to read and fails to meet accessibility criteria. WCAG 2.1 1.4.3 Contrast (Minimum) Level AA: "The visual presentation of text and images of text has a contrast ratio of at least 4.5:1, except for the following: - Large Text: Large-scale text and images of large-scale text have a contrast ratio of at least 3:1; - Incidental: Text or images of text that are part of an inactive user interface component, that are pure decoration, that are not visible to anyone, or that are part of a picture that contains significant other visual content, have no contrast requirement. - Logotypes: Text that is part of a logo or brand name has no contrast requirement." (https://www.w3.org/WAI/WCAG21/quickref/?versions=2.0#contrast-minimum) There are several free websites for checking the contrast ratio, e.g. https://webaim.org/resources/contrastchecker/ You can also use the built-in accessibility functions in Firefox and Chrome, as well as specialist accessibility browser extensions like WAVE (https://wave.webaim.org/)
This issue also applies to other links on a grey background e.g. the links in the OPAC search results. I've amended the bug title to remove the reference to breadcrumbs specifically.
Created attachment 124912 [details] [review] Bug 29037: Accessibility: OPAC links don't have sufficient contrast This patch changes the colour of links on the OPAC to improve the contrast ratio and make the link text easier to read. This accessibility issue was identified using the WebAIM WAVE accessibility browser extension and Google Chrome's Lighthouse tool. To test: 1. Use an accessibility tool (e.g. Chrome's Lighthouse tool) to test the contrast ratio. 2. Confirm that some links (e.g. breadcrumb links and title links in search results) have insufficient contrast. 3. Apply the patch and rebuild the OPAC CSS: yarn build --view opac 4. Use the accessibility tool to confirm the contrast ratio meets minimum requirements 5. Check that the OPAC still looks ok after the changes.
Created attachment 125153 [details] [review] Bug 29037: Accessibility: OPAC links don't have sufficient contrast This patch changes the colour of links on the OPAC to improve the contrast ratio and make the link text easier to read. This accessibility issue was identified using the WebAIM WAVE accessibility browser extension and Google Chrome's Lighthouse tool. To test: 1. Use an accessibility tool (e.g. Chrome's Lighthouse tool) to test the contrast ratio. 2. Confirm that some links (e.g. breadcrumb links and title links in search results) have insufficient contrast. 3. Apply the patch and rebuild the OPAC CSS: yarn build --view opac 4. Use the accessibility tool to confirm the contrast ratio meets minimum requirements 5. Check that the OPAC still looks ok after the changes. Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Created attachment 125279 [details] [review] Bug 29037: Accessibility: OPAC links don't have sufficient contrast This patch changes the colour of links on the OPAC to improve the contrast ratio and make the link text easier to read. This accessibility issue was identified using the WebAIM WAVE accessibility browser extension and Google Chrome's Lighthouse tool. To test: 1. Use an accessibility tool (e.g. Chrome's Lighthouse tool) to test the contrast ratio. 2. Confirm that some links (e.g. breadcrumb links and title links in search results) have insufficient contrast. 3. Apply the patch and rebuild the OPAC CSS: yarn build --view opac 4. Use the accessibility tool to confirm the contrast ratio meets minimum requirements 5. Check that the OPAC still looks ok after the changes. Signed-off-by: Owen Leonard <oleonard@myacpl.org> Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
A marked improvement. Passing QA
Pushed to master for 21.11, thanks to everybody involved!
Pushed to 21.05.x for 21.05.05